How to use Jupyter playbooks through Flakes (Nix)

flake.nix

{
  description = "Jupyter playbook example";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, utils }:
    utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        inherit (pkgs) mkShell;
        inherit (pkgs.python3Packages) ansible-kernel jupyter-c-kernel ilua jupyterlab numpy scipy matplotlib;
        inherit (pkgs.lib) concatMapStringsSep;
        kernels = [ ansible-kernel jupyter-c-kernel ilua ];
        pyUtils = [ jupyterlab numpy scipy matplotlib ];      

      in {
        devShells.default = mkShell {
          buildInputs = pyUtils;
          shellHook = ''
            # kernels
            export JUPYTER_PATH="${concatMapStringsSep ":" (p: "${p}/share/jupyter/") kernels}"
            echo Lets do some python
            alias start="jupyter lab"
          '';
        };
      }
    );
}